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Questions and Answers : Getting started : \'Client detached\' task

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Jeremy
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Message 35909 - Posted 13 Jan 2009 14:21:02 UTC

    My computer crashed yesterday, and I lost two projects. One has ended with \'Compute error\' (which possibly caused the crash) but the other one says \'Client detached\' (Task ID 7674417). This was nearly 50% complete. Is there any way I can reinstate it? I still have the data folder on my computer. At the same time I have upgraded the BOINC software. But now I am running two completely new tasks... Is there any way of getting back to the uncompleted one??

    Dagorath
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    Message 35910 - Posted 13 Jan 2009 15:20:31 UTC - in response to Message 35909.

      Last modified: 13 Jan 2009 15:21:40 UTC

      If you have a backup of the BOINC data folder you can reinstate the one that ended with \"Compute error\". I\'m not sure about reinstating the one that says \"Client detached\" so I\'ll let someone else comment on that one.
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      Profile geophi
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      Message 35911 - Posted 13 Jan 2009 15:40:21 UTC

        \"Client detached\" can happen for some strange reasons, and it doesn\'t always mean that the task failed. I\'ve had a \"client detached\" message when I merged a couple computers, and both models on the client that was supposedly \"detached\" continued running to the end and finished. The status on the webpage doesn\'t change upon successful completion, but credit continues to be accumulated, and the models are still useful to the researchers. Of course if it\'s no longer in the tasks tab of the BOINC Manager GUI, then it is gone.

        Profile mo.v
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        Message 35912 - Posted 13 Jan 2009 18:21:13 UTC

          Last modified: 14 Jan 2009 2:27:44 UTC

          These are Jeremy\'s tasks.

          I think the significant thing is that Jeremy has upgraded today from BOINC 5.10.45 to BOINC v.6 and may not have let BOINC itself migrate the model data correctly. So BOINC has lost sight of two models and is calling them \'detached\'.

          Jeremy, can you tell us whether the following sequence of events is correct?

          On Monday 12 Jan you had model 7674417 (half completed) and 7679952 (1/3 completed) running with BOINC 5.10.45. 7679952 crashed and the server immediately sent you 7725474 to replace it.

          This morning Tuesday just before midday you upgraded to BOINC 6. BOINC 6 didn\'t find the two previous running models 7674417 and 7725474, so the CPDN server sent you two new models (the two at the top of your task list).

          Sorry, I got one of those model numbers wrong earlier so I\'ve edited my post.

          Is that time sequence correct?

          We need to know

          * Have you still got a backup of the complete BOINC 5.10.45 folder made after exiting from BOINC and before 7679952 crashed, or after it crashed but before you upgraded?

          * Later edit: Could you please also tell us what backup method you used?

          (I think it may be possible to rescue one or both of those part-completed models, but only if you made a backup before you upgraded BOINC.)
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          Jeremy
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          Message 35916 - Posted 14 Jan 2009 17:26:48 UTC - in response to Message 35912.

            These are Jeremy\'s tasks.

            I think the significant thing is that Jeremy has upgraded today from BOINC 5.10.45 to BOINC v.6 and may not have let BOINC itself migrate the model data correctly. So BOINC has lost sight of two models and is calling them \'detached\'.

            Jeremy, can you tell us whether the following sequence of events is correct?

            On Monday 12 Jan you had model 7674417 (half completed) and 7679952 (1/3 completed) running with BOINC 5.10.45. 7679952 crashed and the server immediately sent you 7725474 to replace it.

            This morning Tuesday just before midday you upgraded to BOINC 6. BOINC 6 didn\'t find the two previous running models 7674417 and 7725474, so the CPDN server sent you two new models (the two at the top of your task list).

            Sorry, I got one of those model numbers wrong earlier so I\'ve edited my post.

            Is that time sequence correct?

            We need to know

            * Have you still got a backup of the complete BOINC 5.10.45 folder made after exiting from BOINC and before 7679952 crashed, or after it crashed but before you upgraded?

            * Later edit: Could you please also tell us what backup method you used?

            (I think it may be possible to rescue one or both of those part-completed models, but only if you made a backup before you upgraded BOINC.)


            Unfortunately I had not backed up since late November (I use the copy and paste method). Of course I should have backed up before installing the new version of the BOINC program. This version saves the application data in a different place, unlike the old program. I think in trying to sort the folder problem out I lost the unfinished task. Although I still have the folder for hadsm3fub_k4dk_005970459 I now realise that it\'s impossible to restart it with the folder alone. This will teach me to back up more often...

            Profile mo.v
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            Message 35918 - Posted 14 Jan 2009 20:52:57 UTC

              That\'s unfortunate, Jeremy, but there are few members who don\'t lose a model or several while we learn what we should and shouldn\'t do (which isn\'t at all obvious in many cases).

              Just check that your current BOINC Data folder only contains 2 subfolders (which in your XP should I think be coloured yellow) called Projects and Slots. There shouldn\'t be a third subfolder there called Locale; this one should be in the BOINC folder. If these 3 subfolders are where they should be, all the other files are probably also in their proper places. I\'m asking you to carry out this quick check in case you didn\'t let the BOINC installer do all the data migration when you upgraded.

              If I were you I\'d now choose a backup method from the CPDN README collection, linked via my signature. Les\'s manual method works excellently, but there are also more sophisticated methods. With regular backups we can restore crashed models and finish them in most cases.

              Except that we\'ll have to wait for Milo to get the independent forum, which is down because he\'s been working on it, sorted out before you can use the link.
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              Questions and Answers : Getting started : \'Client detached\' task




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